Laars Mighty Therm HH 1010, Installation And Operation Instructions Manual

Page 1: ...use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier from a nearby phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department Installati...

Page 2: ...2 Venting 8 2C Installation of Outdoor Boilers 9 2D Gas Supply and Piping 9 2E Electrical Wiring 10 2F Water Piping of System 11 2G Filling Fully Connected System 11 SECTION 3 Operation 3A Controls General 12 3B Initial Start Up 13 3C To Start Up System 13 3D To Turn Off Boiler 14 3E To Shut Down System 14 SECTION 4 Maintenance 14 SECTION 5 Troubleshooting and Analysis of Service Problems 16 SECTI...

Page 3: ...3149 requirement When required by the authority having jurisdiction the installation must conform to American Society of Mechanical Engineers safety codes for controls and safety devices for automatically fired boilers No CSD 1 and in Canada CGA 3 3 Any modification to the boiler its gas controls gas orifices wiring or draft diverter may void the Laars warranty If field conditions require such mod...

Page 4: ...sult in an excessive water temperature rise and unstable boiler operation If the system water flow is variable it must not be allowed to fall below 30 of full flow The boiler must be equipped with staged or modulated fire with the temperature sensor installed in the outlet water State variable flow when ordering Laars recommends primary secondary pumping for all variable flow systems Primary secon...

Page 5: ... the boiler piping system shall be equipped with a flow control valve or other automatic means to prevent gravity circulation of chilled water through the boiler Chilled water in the boiler will create condensation on the boiler tubes which will drip on the burners and may extinguish the pilot Boilers installed in violation of either of the above requirements may void the warranty 1F Freeze Protec...

Page 6: ...tes the general requirements specify that boiler rooms should be provided with two permanent air supply openings communicating directly through the wall to outside air one within 12 inches 305mm of the ceiling and the other within 12 inches 305mm of the floor Each opening should have a minimum free area of one square inch per 4 000 BTUH input of the total input rating of all appliances in the encl...

Page 7: ...st be completely isolated and this could cause flue products to accumulate in the room Additional air must be supplied to compensate for such exhaust The information in Table 3 is not applicable in installations where exhaust fans or blowers of any type are used Such installations must be designed by qualified engineers Figure 4 Base for Combustible Floors Figure 5 Typical Boiler Installation on C...

Page 8: ...oid ending heater vents near air conditioning or air supply fans The fans can pick up exhaust flue products from the boiler and return them inside the building creating a possible health hazard A minimum of 4 feet 1 2m horizontal distance must be maintained from electrical meters gas meters and relief equipment 5 Always use double wall or insulated vent pipe Type B or equivalent In cold weather un...

Page 9: ...izing any portion of the common venting system the common venting system should be resized to approach the minimum size as determined using the appropriate tables in Appendix G in the National Fuel Gas Code ANSI Z223 1 2C Installation of Outdoor Boilers 1 Locate the boiler to provide the minimum clearances as listed in Table 2 Boiler Clearances See Service Clearance 2 B 1 2 Do not place the boiler...

Page 10: ... corrosion or stress cracking the piping must be rinsed with water after testing unless it has been determined that the leak test solution is noncorrosive 2E Electrical Wiring Electrical diagrams are included with the packet provided with each unit WARNING The boiler must be electrically grounded in accordance with the most recent edition of the National Electrical Code ANSI NFPA 70 In Canada all ...

Page 11: ...ll radiation units at the highest points in the piping throughout the system unless automatic air bleeders are provided at such points 5 Run system circulating pump for a minimum of 30 minutes with the boiler shut off 6 Open all strainers in the circulating system and check for debris 7 Recheck all air bleeders as described in Step 4 above 8 Check liquid level in expansion tank With the system ful...

Page 12: ... 8 seconds and provides 100 safety shutdown 2 Operating Controls a Electrically Operating Controls Single two stage four stage or modulating aquastats are provided in models HH and PH boilers to control the desired service water temperature The temperature sensing bulb is located in the boiler inlet b Modu Snap Valves Mechanical Modulation Only These valves are furnished in addition to the main el...

Page 13: ...and the pilot spark ignition is initiated until the pilot flame has been reestablished On propane systems unit locks out for safety This sequence should be checked by turning off the manual pilot gas valve and at the same time monitoring the audible sparking at the pilot burner and signal interruption to the main valve Caution Propane gas is heavier than air and sinks to the ground Exercise extrem...

Page 14: ...erature see Table 5 3 Minimum input rates The low firing rate setting must be equal to or greater than the specified minimum input rating as shown on the appliance rating plate Laars boilers use gas valves which are factory set to provide an input on low fire that meet or exceed the specified minimum 3D To Turn Off Boiler 1 Turn off main electric switch 2 Close all manual gas valves 3E To Shut Dow...

Page 15: ...occurrence dampen the soot deposits with wet brush or fine water spray before servicing or cleaning the heat exchanger With a wire brush remove soot and loose scale from heat exchanger Clean fallen debris from bottom of heater Make sure burner ports are clear and pilot assembly is free of debris d Reassemble in reverse order Be sure the heat exchanger baffles are replaced 8 The gas and electric co...

Page 16: ...lve terminals Check continuity to actuator coil If open circuit or short is indicated replace coil or operator Possible Cause What To Do A Static pressure in system A Calculate height of water in exceeds setting of relief valve system above boiler Install new valve with psi setting 25 above required static system working pressure Do not exceed 160 psi B Expansion tank is waterlogged B Drain expans...

Page 17: ...to the system Clean tubes with tube cleaning kit Determine hardness Check for modified flow if necessary 7 WATER DRIPPING IN FIREBOX Possible Cause What To Do 6 SOOT IN FLUEWAYS OR IN TUBES OR NOXIOUS FUMES INDICATIVE OF BAD COMBUSTION Possible Cause What To Do A Combustion air supply to A Check air supply opening boiler room is inadequate Look for debris in screen or louvre which covers combustio...

Page 18: ...981 10364300 10364300 10364300 10364300 10364300 10364300 10364300 10364300 10364300 Return Header S00642 Bronze 10364301 10364301 10364301 10364301 10364301 10364301 10364301 10364301 10364301 13 Inlet Outlet Header S 00943 10364500 10364500 10364500 10364500 10364500 10364500 10364500 10364500 10364500 Inlet Outlet Header S00640 10364501 10364501 10364501 10364501 10364501 10364501 10364501 1036...

Page 19: ...rature Control Wells Inlet Outlet Header 1 Firing Mode L K C 2 Dry Wells 2 Firing Mode H A Natural Gas Boilers Heaters 500 thru 850 2 Dry Wells 1010 thru 1430 3 Dry Wells 1670 thru 1825 4 Dry Wells B Propane Gas Boilers Heaters 500 thru 850 2 Dry Wells 1010 thru 1852 3 Dry Wells ...

Page 20: ...le Rear Panel Heat Shield Weldment 10540401 10540402 10540403 10540404 10540405 10540406 10540407 10540408 10540409 33 End Panel Upper Right 10531600 10531600 10531600 10531600 10531600 10531600 10531600 10531600 10531600 34 End Panel Upper Left 10534000 10534000 10534000 10534000 10534000 10534000 10534000 10534000 10534000 35 Upper Rear Panel Heat Shield Weldment 10540501 10540502 10540503 10540...

Page 21: ...Mighty Therm Hydronic Boiler Page 21 Figure 20 Tile Assemblies ...

Page 22: ...34600 W0034600 W0034600 W0034600 Pilot Burner Honeywell Standing Pilot Propane W0034400 W0034400 W0034400 W0034400 W0034400 W0034400 W0034400 W0034400 W0034400 53 Pilot Burner Johnson IID Pilot Nat W0034500 W0034500 W0034500 W0034500 W0034500 W0034500 W0034500 W0034500 W0034500 Pilot Burner Honeywell IID Pilot Nat W0034300 W0034300 W0034300 W0034300 W0034300 W0034300 W0034300 W0034300 W0034300 54 ...

Page 23: ...11400 F0011400 F0011400 75 Plug Sq Hd 1 NPT P0033000 P0033000 P0033000 P0033000 P0033000 P0033000 P0033000 P0033000 P0033000 76 Plug 1 2 NPT P0026900 P0026900 P0026900 P0026900 P0026900 P0026900 P0026900 P0026900 P0026900 77 Nipple Brass 3 4 x 2 P0025300 P0025300 P0025300 P0025300 P0025300 P0025300 P0025300 P0025300 P0025300 78 Valve Press Relief 3 4 75 PSI A0063600 A0063600 A0063600 A0063600 A006...

Page 24: ...50703 10550704 97 Burner Tray I I D Mech Mod 3 4 Sect Manifold Nat 10551201 10551202 10551203 10551204 10551205 98 Burner Tray St Pl Mech Mod SpIt Manifold Pro 10550301 10550302 10550303 10550304 99 Burner Tray St Pl Mech Mod 3 Sect Manifold Pro 10550501 10550502 10550503 10550504 10550505 100 Combination Gas Valve V0059600 V0059600 V0059600 V0070400 V0070400 V0070400 4 Stage Nat 2 2 2 2 2 2 101 S...

Page 25: ...Mighty Therm Hydronic Boiler Page 25 Figure 21 Outdoor Parts ...

Page 26: ...59903 10659904 10659905 10659906 10659907 10659908 10659909 10 Rear Base Extension 10658501 10658502 10658503 10658504 10658505 10658506 10658507 10658508 10658509 11 Gas Train Interface Plate 20050200 20050200 20050200 20050200 20050200 20050200 20050200 20050200 20050200 12 Front End Panel 10657500 10657500 10657500 10657500 10657500 10657500 10657500 10657500 10657500 2 2 2 2 2 2 2 2 2 13 Front...

Page 27: ...06 10661507 10661508 10661509 2 2 2 4 4 4 4 4 4 10 Baffle Heat Exchanger 10667701 10667702 10667703 10667704 10667705 10667706 10667707 10667708 10667709 7 14 14 14 14 28 28 28 14 41 Middle Front Panel 10662001 10662002 10662003 10662004 10662005 10662006 10662007 10662008 10662009 42 Sweep Sheet Flue 10662201 10662202 10662203 10662204 10662205 10662206 10662207 10662208 10662209 Collector 48 Bas...

Page 28: ...hould be ordered separately SECTION 8 Optional Parts Descriptions and Order Numbers H0117400E Standard PH Model Pumps Armstrong 1050 PH Model Part Number Description 500 850 A2000700 1 3 hP with 3 1 2 Impeller 1010 1200 A2000800 1 2 hP with 4 1 4 Impeller 1430 1670 A2000900 3 4 hP with 5 1 4 Impeller Optional PH Model Pumps B G 1522 PH Model Part Number Description 500 715 A0048600 1 4 hP with 3 1...